May 2007 Workshop Manual 12-1-1
Climate Control (12.00)
Contents
Body Ventilation (12.01) ...................................... 12-1-2Air Intake & Distribution System............................ 1-2 Air Intake Actuator ................................................. 1-3
Air Mix Actuator .................................................... 1-3
Airflow Mode Actuator........................................... 1-4
Heater System (12.02) ......................................... 12-2-1 Maintenance ........................................................... 2-1 RHD/LHD Heater Unit (Including ECU)-Renew...... 2-1
Air Conditioning (A/C) System (12.03) ................ 12-3-1
Major Components................................................. 3-2 Refrigerant System ................................................. 3-3
Storing Refrigerant ................................................. 3-4
Handling Insufficient Refrigerant Level ................... 3-4
Handling Compressor Oil....................................... 3-4
Refrigeration Cycle................................................. 3-4
Specifications.......................................................... 3-5 Refrigerant and Lubricant ....................................... 3-5
Capacities .............................................................. 3-5
Torque Figures ....................................................... 3-5
Diagnostics ............................................................. 3-6 Electrical Connectors.............................................. 3-6
DTC Inspection ...................................................... 3-7
Single Fault Codes.................................................. 3-7
Multiple Fault Codes .............................................. 3-8
Maintenance ........................................................... 3-9 Connections .......................................................... 3-9
Recovery................................................................ 3-9
Evacuation ........................................................... 3-10
Charging .............................................................. 3-10
A/C System Testing............................................... 3-11
Leaks ................................................................... 3-12
System Pressure Fault Classification ...................... 3-12
Maintenance ......................................................... 3-13 Condenser-Renew ............................................... 3-13
Air Conditioning Compressor-Renew ................... 3-13
Blower Assembly-Renew ...................................... 3-14
Compressor to Condenser Tube
Assembly-Renew.................................................. 3-14
Troubleshooting ................................................... 3-16
Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
12-3-4 Workshop Manual May 2007
Storing Refrigerant
Handling Insufficient Refrigerant Level
Handling Compressor Oil
Refrigeration Cycle
Operation
1. The Compressor (1) dr aws low pressure, low
temperature, refrigerant vapour from the evaporator (5)
and compresses it, raising th e refrigerant pressure and
temperature.
2. This high pressure, hot, refrigerant vapour enters the condenser (2), where it is cooled by the flow of ambient
air and changes state into a cooler, high pressure liquid.
3. From the condenser, the liqu id passes into the receiver
drier (3) which has three functions:
• Removes moisture from the refrigerant using a desiccant
• Filters the refrigerant to remove system contaminants
• Stores the refrigerant to cope with varying system refrigerant demands
4. The filtered liquid refrigerant, still at high pressure, then enters the expansion valve (4). Here it passes through a
controlled orifice and emerges as an atomised liquid
spray. This has the effect of reducing the refrigerant
pressure and temperature. The cold refrigerant spray
now flows into the evaporator (5).
5. As refrigerant passes through the evaporator core, it cools the incoming airflow. Heat is absorbed by the
refrigerant, during this process and it once again changes
state, from an atomised cool liquid into a vapour. The
refrigerant vapour then returns to the compressor for the
cycle to be repeated.
An automatic safety valve is incorporated in the compressor,
which will open if the system pressure rises above 41 bar.
The valve will reseat when the pressure drops below 27,6
bar. When the safety valve is open, the compressor will 'free
Warning
The refrigerant container is highly pressurized. If it is subjected to high heat, it could explode, scattering metal fragments and liquid refrigerant that can
seriously injure personnel. Store refrigerant at
temperatures below 40
oC (104 oF).
Caution
If an insufficient refrigerant level is detected while
troubleshooting, do not char ge (add) the refrigerant.
Because an accurate amount of refrigerant cannot be
determined from the pressure indicated on the
recovery / recycling / rechar ging unit, never charge the
refrigerant.
Caution
If there is too much or to o little refrigerant from the
refilling, there may be secondary problems such as
damage to the refrigerant cycl e parts, or a decrease of
cooling performance. Therefore, if it is determined that the refrigerant level is insufficient, completely remove refrigerant from the refriger ant cycle and refill with
refrigerant to the specified amount.
Caution
Use only ND8 compressor oil for this vehicle. Using a PAG oil other than DENSO OIL8 compressor oil will damage the A/C compressor.
Caution
Do not spill the ND8 compressor oil on the vehicle. A drop of compressor oil on the vehicle surface can
damage the paint work. If oil gets on the vehicle, wipe it off immediately.
Caution
ND8 compressor oil has a high moisture absorption
efficiency. If moisture mixe s with the compressor oil,
the refrigerant system could be damaged. Ensure caps
are installed immediately afte r using the compressor oil
or removing refrigerant system parts to prevent moisture absorption.
+ L J K 3 U H V V X U H + R W 9 D S R X U
+ L J K 3 U H V V X U H &